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Solar road stud:  

Solar cell: poly-crystalline silicon / single-crystalline silicon (3v,75mA)
Storage battery: Ni-MH / Super Capacitor
Light source: super luminosity LED;
LED quantity: 2  pcs                                                                                                     Luminosity colors: red, green, blue, white, yellow (for any choice)
Luminous mode: varying type /Constant Type
Work time: 108 hours above for Varying Type; and more than 24 hours for constant type(standard luminosity intensity)
Work temperature: -25 to +75 degree C.
Material of light: Polycarbonate
Resist compression: 20 tons                                                                                               Waterproof grade IP>67                                                                                           Life: >5 years (Ni-MH)  or >15 year ( Super Capacitor)                                                            View distance: over 800m        Guarantee period:14 months